Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111139
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dc.contributor.authorPleshivtsev, K. N.en
dc.contributor.authorSheshukov, O. Yu.en
dc.contributor.authorMetelkin, A. A.en
dc.contributor.authorShevchenko, O. I.en
dc.date.accessioned2022-05-12T08:13:33Z-
dc.date.available2022-05-12T08:13:33Z-
dc.date.issued2021-
dc.identifier.citationHydrogen Removal in Circulating Vacuum Degasser under Conditions of PJSC "NLMK" / K. N. Pleshivtsev, O. Yu. Sheshukov, A. A. Metelkin et al. — DOI 10.21638/spbu19.2021.112 // Izvestiya Ferrous Metallurgy. — 2021. — Vol. 64. — Iss. 8. — P. 543-549.en
dc.identifier.issn0368-0797-
dc.identifier.otherAll Open Access, Hybrid Gold3
dc.identifier.urihttp://hdl.handle.net/10995/111139-
dc.description.abstractFor high-quality steel smelting, stage-by-stage production is required, which has a complex of metallurgical units capable for producing products with high performance properties and low content of harmful impurities. One of the harmful impurities is hydrogen, so it is important to limit its content in the metal. To ensure the specified hydrogen content, the metal in the steel out-of-furnace treatment at Converter Shop No. 2 (CS-2) of PJSC "Novolipetsk Metallurgical Plant" ("NLMK") is subjected to vacuum treatment in a circulating vacuum degasser. Despite the prevalence of circulating vacuum derassers, theoretically, mechanism of hydrogen removal in these metallurgical units has been insufficiently studied. To increase efficiency of hydrogen removal, theoretical calculations were performed to remove it from the metal. There are several mechanisms for hydrogen removing: direct transfer of hydrogen from metal to the surrounding space; formation of gas bubbles in metal and their direct ascent; nucleation of hydrogen bubbles at the border of refractory wall and metal; removal of hydrogen by metal blowing with neutral gas (argon). It is shown that the main ways of hydrogen removal in a circulating vacuum degasser are direct transfer of hydrogen from metal to the surrounding space and blowing of melt with transporting gas. In the CS-2 of PJSC "NLMK", both ways are implemented at a circulating vacuum degasser. Vacuum pumps provide pressure in a vacuum chamber of less than 101.3 Pa (0.001 atm.). It promotes intensive removal of hydrogen from the metal surface. To ensure circulation of metal, transporting gas argon is supplied to the inlet pipe of the RH degasser, which also takes part in removal of dissolved gases by transferring hydrogen to neutral gas bubbles. Additionally, performed calculations have shown that the main way of degassing in conditions of CS-2 of PJSC "NLMK" is removal of hydrogen into the bubbles of carrier gas. © 2021 National University of Science and Technology MISIS. All rights reserved.en
dc.format.mimetypeapplication/pdfen
dc.language.isoruen
dc.publisherNational University of Science and Technology MISISen1
dc.publisherNational University of Science and Technology MISiSen
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.sourceIzv Ferrous Metall.2
dc.sourceIzvestiya Ferrous Metallurgyen
dc.subjectCIRCULATING VACUUM DEGASSERen
dc.subjectDEGASSINGen
dc.subjectHYDROGEN REMOVALen
dc.subjectOUT-OF-FURNACE STEEL TREATMENTen
dc.titleHydrogen Removal in Circulating Vacuum Degasser under Conditions of PJSC "NLMK"en
dc.typeArticleen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeinfo:eu-repo/semantics/publishedVersionen
dc.identifier.doi10.21638/spbu19.2021.112-
dc.identifier.scopus85115302629-
local.contributor.employeePleshivtsev, K.N., Pjsc "Novolipetsk Metallurgical Plant", 2 Metallurgov Sqr., Lipetsk, 398040, Russian Federation; Sheshukov, O.Yu., Ural Federal University Named after First President of Russia B.N. Yeltsin, 19 Mira Str., Yekaterinburg, 620002, Russian Federation, Ural Branch of Russian Academy of Sciences, Institute of Metallurgy, 28 Mira Str., Yekaterinburg, 620002, Russian Federation; Metelkin, A.A., Nizhny Tagil Inst. (Br.) of Ural Fed. University Named after First President of Russia B.N. Yeltsin, 59 Krasnogvardeyskaya Str., Nizhny Tagil, Sverdlovsk Region, 622031, Russian Federation; Shevchenko, O.I., Nizhny Tagil Inst. (Br.) of Ural Fed. University Named after First President of Russia B.N. Yeltsin, 59 Krasnogvardeyskaya Str., Nizhny Tagil, Sverdlovsk Region, 622031, Russian Federationen
local.description.firstpage543-
local.description.lastpage549-
local.issue8-
local.volume64-
local.contributor.departmentPjsc "Novolipetsk Metallurgical Plant", 2 Metallurgov Sqr., Lipetsk, 398040, Russian Federation; Ural Federal University Named after First President of Russia B.N. Yeltsin, 19 Mira Str., Yekaterinburg, 620002, Russian Federation; Ural Branch of Russian Academy of Sciences, Institute of Metallurgy, 28 Mira Str., Yekaterinburg, 620002, Russian Federation; Nizhny Tagil Inst. (Br.) of Ural Fed. University Named after First President of Russia B.N. Yeltsin, 59 Krasnogvardeyskaya Str., Nizhny Tagil, Sverdlovsk Region, 622031, Russian Federationen
local.identifier.pure23724755-
local.identifier.eid2-s2.0-85115302629-
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